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Artículo

Effect of iron on the properties of sulfated zirconia

Costa Pereira, Amalia Luz; Marchetti, Sergio GustavoIcon ; Albornoz, Alberto; Reyes , Patricio; Oportus, Marcelo; Rangel. Maria do Carmo
Fecha de publicación: 12/2008
Editorial: Elsevier Science
Revista: Applied Catalysis A: General
ISSN: 0926-860X
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ingeniería Química

Resumen

Sulfated zirconia has found several industrial applications, mainly for catalyzing reactions which require acidic sites. In order to control the properties of this solid, the effect of iron on the sulfated zirconia properties was studied in this work. Samples with different iron to zirconium molar ratios were prepared by the sol–gel method, followed by sulfation and characterization by several techniques. It was found that all iron ions go into zirconia when Fe/Zr 0.4. However, when higher amounts of iron (Fe/Zr 0.8) are added, hematite is segregated. Different phases can be obtained depending on the iron content and on the sulfur presence. Iron increases the specific surface areas of both sulfated and pure zirconia but does not affect the incorporation of sulfate groups as compared to pure zirconia. Iron also makes the solids thermally more stable and modifies the sulfated zirconia surface creating acidic sites with medium strength. Therefore, it is possible to control the acidity of the solid doping the sulfated zirconia with iron. All these changes are very useful for catalytic applications.
Palabras clave: Iron-Doped Zirconia , Sulfated Iron Oxide , Sulfated Zirconia
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/22666
URL: http://www.sciencedirect.com/science/article/pii/S0926860X07006126
DOI: http://dx.doi.org/10.1016/j.apcata.2007.09.042
Colecciones
Articulos(CINDECA)
Articulos de CENTRO DE INV EN CS.APLICADAS "DR.JORGE J.RONCO"
Citación
Costa Pereira, Amalia Luz; Marchetti, Sergio Gustavo; Albornoz, Alberto; Reyes , Patricio; Oportus, Marcelo; et al.; Effect of iron on the properties of sulfated zirconia; Elsevier Science; Applied Catalysis A: General; 334; 1-2; 12-2008; 187-198
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